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Last modified by Alexandru Pentilescu on 2024/07/22 21:37
From version 11.1
edited by Alexandru Pentilescu
on 2024/07/22 21:24
Change comment: There is no comment for this version
To version 10.1
edited by Alexandru Pentilescu
on 2024/07/22 21:05
Change comment: There is no comment for this version

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163 163  wget https://github.com/prometheus/node_exporter/releases/download/v0.15.2/node_exporter-0.15.2.linux-amd64.tar.gz
164 164  {{/code}}
165 165  
166 -Once this is done, extract the contents of the archive:
167 -
168 -{{code language="bash"}}
169 -tar -xf node_exporter-0.15.2.linux-amd64.tar.gz
170 -{{/code}}
171 -
172 -We will be running this as its own user. In order to avoid having to create a home directory for that user, it's best if we move the utilities that just got extracted to the root directories:
173 -
174 -{{code language="bash"}}
175 -mv node_exporter-0.15.2.linux-amd64/node_exporter /usr/local/bin
176 -{{/code}}
177 -
178 -Create the new user:
179 -
180 -{{code language="bash"}}
181 -useradd -rs /bin/false node_exporter
182 -{{/code}}
183 -
184 -Create a new systemd service file, that will start the node_exporter automatically, after each boot:
185 -
186 -{{code language="systemd"}}
187 -[Unit]
188 -Description=Node Exporter
189 -After=network.target
190 -
191 -[Service]
192 -User=node_exporter
193 -Group=node_exporter
194 -Type=simple
195 -ExecStart=/usr/local/bin/node_exporter
196 -
197 -[Install]
198 -WantedBy=multi-user.target
199 -{{/code}}
200 -
201 -Once this has been done, reload the service files, enable the newly created service and start it:
202 -
203 -{{code language="bash"}}
204 -systemctl daemon-reload
205 -systemctl enable node_exporter
206 -systemctl start node_exporter
207 -{{/code}}
208 -
209 -== Installing Prometheus ==
210 -Prometheus will be aggregating all the data that is collected by the node_exporter and allowing for it to be queried with a standardized syntax.
211 -
212 -To install Prometheus, we must first download it:
213 -
214 -{{code language="bash"}}
215 -wget https://github.com/prometheus/prometheus/releases/download/v2.1.0/prometheus-2.1.0.linux-amd64.tar.gz
216 -tar -xf prometheus-2.1.0.linux-amd64.tar.gz
217 -{{/code}}
218 -
219 -Much like with node_exporer above, we will force Prometheus to run as its own user, for security reasons. As such, we should isolate its files to the root filesystem:
220 -
221 -{{code language="bash"}}
222 -mv prometheus-2.1.0.linux-amd64/prometheus prometheus-2.1.0.linux-amd64/promtool /usr/local/bin
223 -{{/code}}
224 -
225 -We should also create new directories to store the relevant data for Prometheus:
226 -
227 -{{code language="bash"}}
228 -mkdir /etc/prometheus /var/lib/prometheus
229 -{{/code}}
230 -
231 -Then move the current directories to the appropriate system-level locations:
232 -
233 -{{code language="bash"}}
234 -mv prometheus-2.1.0.linux-amd64/consoles prometheus-2.1.0.linux-amd64/console_libraries /etc/prometheus
235 -{{/code}}
236 -
237 -== Configuring Prometheus ==
238 -Create a new /etc/prometheus/prometheus.yml with the following contents:
239 -
240 -{{code language="yml"}}
241 -global:
242 - scrape_interval: 10s
243 -scrape_configs:
244 - - job_name: 'node'
245 - static_configs:
246 - - targets: ['localhost:9100']
247 -{{/code}}
248 -
249 -Once the above is done, we should create the new prometheus user:
250 -
251 -{{code language="bash"}}
252 -useradd -rs /bin/false prometheussudo chown -R prometheus: /etc/prometheus /var/lib/prometheus
253 -chown -R prometheus: /etc/prometheus /var/lib/prometheus
254 -{{/code}}
255 -
256 -Then, please create an /etc/systemd/system/prometheus.service file with the following contents:
257 -
258 -{{code language="systemd"}}
259 -[Unit]
260 -Description=Prometheus
261 -After=network.target
262 -
263 -[Service]
264 -User=prometheus
265 -Group=prometheus
266 -Type=simple
267 -ExecStart=/usr/local/bin/prometheus \
268 - --config.file /etc/prometheus/prometheus.yml \
269 - --storage.tsdb.path /var/lib/prometheus/ \
270 - --web.console.templates=/etc/prometheus/consoles \
271 - --web.console.libraries=/etc/prometheus/console_libraries
272 -
273 -[Install]
274 -WantedBy=multi-user.target
275 -{{/code}}
276 -
277 -Then reload:
278 -
279 -{{code language="bash"}}
280 -systemctl daemon-reload
281 -systemctl enable prometheus
282 -systemctl start prometheus
283 -{{/code}}
284 -
285 285  )))
286 286  
287 287